.st_list {
    float: left;
}
.st_list ul li {
    float: left;
}
.st_list ul li a{
    display: block;
    line-height: 47px;
    padding: 0 30px;
    font-size: 16px;
    font-weight: 700;
    color: #000;
}
.st_con {
    float: left;
}
.st_con  ul li{
    float: left;
}
.st_con ul li a{
    display: block;
    line-height: 49px;
    padding: 0 20px;
    font-size: 14px;
}
.st_con ul li:last-child a::after{
  content: '\e91e';
  font-family: 'icomoon';
}
.nav {
    overflow: hidden;
}
.sk_bd ul li {
    overflow: hidden;
    float: left;
    width: 290px;
    height: 460px;
    border:1px solid transparent;
}
.sk_bd ul li:hover{
    border:1px solid #c81532
}